JPS5923835Y2 - Shield excavator solids discharge device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a solid matter discharge device for a shield tunneling machine.

In a mud water pressurization type shield excavator that excavates while preventing the collapse of the rock face by pressurizing mud, slurry transport is the main method for discharging excavated earth and sand outside the mine.

Therefore, if the excavated soil contains coarse solids that cannot be transported as slurry, the coarse solids will affect whether or not the slurry of the entire excavated soil can be transported.

Therefore, it is necessary to take the coarse solids contained in the excavated soil into the slurry transport pipe or into the pressure chamber and then directly discharge them out of the transport route.

The present invention has been devised in view of the above, and embodiments thereof will be described below with reference to FIGS. 1 to 4.

Reference numeral 1 denotes a shield main body, the interior of which is divided by a partition wall 2 into a pressure chamber 3 and an atmospheric pressure chamber 4 facing the face earth.

A cutter 5 is provided in the pressure chamber 3, and the cutter 5 is pivotally supported by the shield body 1 and the partition wall 2, and the cutter 5 is provided in the atmospheric pressure chamber 4.
The drive motor 6 is interlocked with the drive motor 6 installed in the drive motor 6.

A mud pump P1 is connected between the pressure chamber 3 and the specific gravity adjustment tank 7 on the ground.
They are communicated through a mud water pipe 8 having a

Further, a hopper 9 is provided in the pressure chamber 3.

An opening/closing gate 11 is provided at the outlet 10 of the hopper 9, and a large-diameter pipe 12 is connected to the large-diameter pipe 12, and a drainage pipe 13 (shown in FIGS. 1 and 2 for ease of understanding) is connected to the large-diameter pipe 12. Therefore, it is represented as thick.

) are provided consecutively. 14 is a ground processing facility,
Slurry-like excavated soil 15 that has passed through the drainage pipe 13
The reception is accepted.

Two pallets 7V1. V2 is interposed, and these valves Vl.

(2) A sludge pump P2 is installed on the downstream side of 2.

The drain pipe 13 has a diameter that does not allow the introduction of coarse solid matter 16 in the excavated earth and sand over its entire length.

The large-diameter pipe 12 is configured such that its diameter becomes smaller toward the downstream side, and the coarse solids 16 are allowed to enter the inside thereof.

Moreover, the large diameter pipe 12 is a pair of half pipes 16A and 16B.
One circumferential end of each pipe 16A, 16B is interconnected via a hinge 17.

As is clear from FIG. 2, this hinge 17 is pivotally supported by brackets 18 and 19 protruding from the outlet 10 of the hopper 9 and the starting end of the drained mud water pipe 13, respectively.

20 is a closed stock tank provided to surround the large diameter pipe 12, and a gate 2 is provided in the side opening 21.
2 is provided.

23 is a cylinder device for opening and closing the gate 22.

A cylinder device 24 is provided on the upper plate of the stock tank 20, and a link 25A whose piston rod tips can swing toward and away from each other.

The arms 26A and 26B are pivotally connected via 25B to the tips of arms 26A and 26B that protrude from the pipes 16A and 16B.

Therefore, by moving the cylinder device 24 in and out, the pipes 16A and 16B swing around the hinge 17 to open and close their lower portions as shown in FIG. 3 or 4.

There are two valves in the mud pipe 8■3. v4 is interposed, and these valves ■3. ■The flow path between 4 and the stock tank 2
0 upper part, and the inlet side of valve v3 and the drainage water pipe 13
The flow paths between the two valves Vl and V2 inside are communicated with each other by communication pipes 27 and 28, respectively.

Each connecting pipe 27.28 also has a valve ■5. A V6 is installed.

Furthermore, the inlet of the sludge pump P2 and the stock tank 2
The inner lower part of the pipe 2 has a valve ■7 and a pump P3.
9 communicates with each other.

30 is an air vent pipe for the stock tank 20. Next, we will explain the outline of excavation.

Valve Vl, V2°V3. V4. Open V5 and gate 11, close valve ■6゜■7, and open large diameter pipe 1.
2 is closed, and mud water is fed from the specific gravity adjustment tank 7 to the pressure chamber 3 at an appropriate pressure through the mud feeding pump P1 and the mud feeding water pipe 8.

At this time, the stock tank 20 is filled with water.

Along with this, a hopper 9, a large-diameter pipe 12, a drainage pipe 1
The muddy water in the pressure chamber 3 is discharged into the treatment equipment 14 in appropriate amounts through the pump P2 and the mud pump P2.

In this way, the drive motor 6 is operated while adjusting the pressure in the pressure chamber 3 to an extent that can prevent the collapse of the face ground, the cutter 5 is rotated to excavate the face ground, and the excavated soil is transferred to the pressure chamber 3. Let it be taken into.

The excavated soil in the pressure chamber 3 is sequentially fed into the hopper 9 by reversing the rotating packet as the cutter 5 rotates, reaches the large-diameter pipe 12 from the outlet 10, and then passes through the drainage pipe 13 to the treatment equipment 14. is discharged to.

In this case, if the excavated soil contains coarse solids 16, the coarse solids 16 are prevented from entering the interior at the starting end of the drainage pipe 13 and remain within the large diameter pipe 12.

When a certain amount of coarse solid matter 16 has been collected in the large diameter pipe 12 in this way, the cylinder device 24 is retracted to open the lower part of the large diameter pipe 12 as shown in FIG. Let it drain inside.

At this time, the stock tank 20 is filled with water, so the pressure in the pressure chamber 3 does not drop.

Therefore, even when the coarse solids 16 are discharged into the stock tank 20, an appropriate holding pressure against the face ground is ensured.

After discharging the coarse solids, the lower part of the large-diameter pipe 12 is closed again as shown in FIG. 4, and excavation continues.

If it is difficult to discharge the coarse solid matter 16 inside even if the large-diameter pipe 12 is opened, use the valve ■2. ■Close 3, valve ■7
is opened to cause the mud water to flow backward in the mud drain pipe 13, and the coarse solids 16 are completely discharged.

The coarse solids 16 temporarily stored in the stock tank 20 are transferred to the gate 22 and the valve ■1. Close V3 and open valve ■6. ■
7 and performs bypass operation to remove the stock tank 2.
0 is emptied and the gate 22 is opened to discharge it.

After discharging the coarse solids 16, the gate 22 and the valve V1. V
3. ■6. Return to the original position (7), stop the pump P3, open the valve (5), fill the stock tank 20 with water, and then excavate.

Note that it is also possible to interpose a crusher in the middle of the drained mud water pipe 13 to further reduce the solids in the pipe 13 into fine particles and efficiently transport the slurry.

As described above, according to the present invention, when the stock tank is filled with water and a certain amount of coarse solid matter has been collected in the large-diameter pipe, the drive device is activated to The side edges are separated from each other and the coarse solids therein are discharged into the stock tank.

At this time, since the stock tank is filled with water, the pressure in the pressure chamber will not drop, and the face earth will not collapse.

Next, after bringing the lower side edges of both half-shaped pipes into contact with each other, the water in the stock tank is drained, and the opening gate is opened to discharge the coarse solids in the stock tank. be.

[Brief explanation of drawings]

Fig. 1 to Fig. 4 show an embodiment of the present invention, Fig. 1 is a vertical side view, Fig. 2 is an enlarged longitudinal side view of main parts, and Fig. 3 is a view taken along the line A-A in Fig. 2. , FIG. 4 is a view taken along the line A--A in FIG. 2 in an operating state. 1... Shield body, 2... Bulkhead, 3
...Pressure chamber, 5...Cutter, 8...
...Mud water pipe, 9...Hopper, 12...
...Large diameter pipe, 13...Mud water pipe, 16...
... coarse solid matter, 17 ... hinge, 20 ...
・Stock tank.

Claims (1)

[Scope of utility model registration request] A large-diameter pipe that allows the intrusion of coarse solids is interposed between the starting end of the drainage piping, which has a diameter that does not allow the intrusion of coarse solids, and the hopper outlet of the pressure chamber that holds the face mass. The pipe is composed of a pair of half pipes, and the upper side edges of the two half pipes that contact each other are connected by a hinge, and the two half pipes are rotated about the hinge as a fulcrum. A driving device is provided to bring the lower side edges of the split pipe into contact with and away from each other, a closed stock tank surrounding the large diameter pipe is provided, and a gated opening is formed in the stock tank, and a water supply pipe and A solid material discharge device for a shield excavator, characterized in that a drainage pipe is connected to the hopper, and an opening/closing gate is provided at the outlet of the hopper.